Lost Mega Cities That Were Centuries Ahead of Their Time
Did you know there were mega cities in history that were way ahead of their time? Take Mohenjo-Daro in ancient India—it had an advanced drainage system and grid-like streets 4,500 years ago! Or the Mayan city of Tikal, with its towering pyramids and complex water management systems hidden deep in the jungle.
PBS / YouTube
National Geographic / YouTube
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The skinny
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